package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

/**
 * ClassName: reportServiceImpl
 * Package: com.sky.service.impl
 * Description:
 *
 * @Author 臧洁
 * @Create 2025/4/22 15:47
 * @Version 1.0
 */
@Service
public class reportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 营业额统计
     *
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> list = new ArrayList<>();
        list.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            list.add(begin);
        }
        List<Double> turnoverList = new ArrayList<>();
        //计算营业额
        //遍历每天
        for (LocalDate date : list) {
            //获取每天的时间最小和最大才能进行后续的判断
            LocalDateTime dayBegin = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime dayEnd = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", dayBegin);
            map.put("end", dayEnd);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(list, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    /**
     * 用户数据统计
     *
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> list = new ArrayList<>();
        list.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            list.add(begin);
        }
        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();
        //计算用户数据
        //遍历每天
        for (LocalDate date : list) {
            //获取每天的时间最小和最大才能进行后续的判断
            LocalDateTime dayBegin = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime dayEnd = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();

            map.put("end", dayEnd);
            Integer totalUser = userMapper.countByMap(map);
            map.put("begin", dayBegin);
            Integer newUser = userMapper.countByMap(map);

//            totalUser = totalUser == null ? 0 : totalUser;
//            newUser = newUser == null ? 0 : newUser;

            totalUserList.add(totalUser);
            newUserList.add(newUser);

        }

        return UserReportVO
                .builder()
                .dateList(StringUtils.join(list, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
    }

    /**
     * 订单数据统计
     *
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //一个datelist用来封装横坐标值
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }


        //每日订单总数,和每日新增
        List<Integer> validOrderList = new ArrayList<>();
        List<Integer> totalOrderList = new ArrayList<>();
        //计算用户数据
        //遍历每天
        for (LocalDate date : dateList) {
            //获取每天的时间最小和最大才能进行后续的判断
            LocalDateTime dayBegin = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime dayEnd = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();

            map.put("end", dayEnd);
            map.put("begin", dayBegin);

            //每天的总的订单数
            Integer totalOrder = countByMap(dayBegin, dayEnd, null);
            //每天的有效订单数
            Integer validOrder = countByMap(dayBegin, dayEnd, Orders.COMPLETED);

            //把每天的数据添加到list中去
            validOrderList.add(validOrder);
            totalOrderList.add(totalOrder);
        }
        //剩下三个参数,总的订单数和总的有效订单数,和比值

        Integer validOrderSum = validOrderList.stream().reduce(Integer::sum).get();
        Integer totalOrderSum = totalOrderList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate = 0.0;
        if (totalOrderSum != 0) {
            orderCompletionRate = validOrderSum.doubleValue() / totalOrderSum;
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCompletionRate(orderCompletionRate)
                .totalOrderCount(totalOrderSum)
                .orderCountList(StringUtils.join(totalOrderList, ","))
                .validOrderCount(validOrderSum)
                .validOrderCountList(StringUtils.join(validOrderList, ","))
                .build();
    }

    /**
     * 查询销量排名top10接口
     *
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSaleTop10(LocalDate begin, LocalDate end) {
//直接查询就好,但是要根据时间查询的话需要时间数据转成localdatetime类型
        LocalDateTime Begin = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime End = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOS=orderMapper.getSaleTop10(Begin,End);
        //把上面商品中的name和sum的list分别取出来
        List<String> names = goodsSalesDTOS.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String namesString = StringUtils.join(names, ",");
        List<Integer> numbers = goodsSalesDTOS.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numbersString = StringUtils.join(numbers, ",");
        //封装返回结果数据
        return SalesTop10ReportVO
                .builder()
                .nameList(namesString)
                .numberList(numbersString)
                .build();
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
//1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }


    /**
     * @param
     * @return
     */
    private Integer countByMap(LocalDateTime begin, LocalDateTime end, Integer status) {
        Map map = new HashMap();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);
        Integer count = orderMapper.countByMap(map);
        return count;

    }

}

